Molybdenum Copper Process SHS Preheated- Explosive Consolidation

Molybdenum Copper Alloy Process SHS Preheated- Explosive Consolidation As Follows:

SHS preheated explosive consolidation of explosive consolidation technology first appeared in the 1950s. The specific principle is the effect of the blast, the powder system by adiabatic compression, extrusion collision between particles in the grain boundary region and cause local melting powder consolidation.

Since high melting point of molybdenum, an explosion under normal temperature consolidation process is difficult to prepare a copper molybdenum alloy with excellent performance gradient material, and found that, after preheating the powder can reduce the yield strength, the occurrence of softening effect, therefore, the explosion solid system before the end of preheating the powder explosive consolidation in recent years become the leading technology research direction.

Jiang Zhiming, who will be mixed in the study of molybdenum-copper alloy powder layering (from top to bottom on each copper content increased) to the steel pressure mold filling, molding, using axisymmetric bi detonating manner, so that the shock wave through the water medium pressure transmission to the compacts, in the place from top to bottom compacts spread powder (TiO2 + Al + C) / (Fe2O3 + Al), and arranged tungsten electric ignition device. Compacts components using steel protection.

molybdenum copper alloy

Experimental results show that the self-propagating Preheat explosive consolidation can successfully prepared molybdenum copper alloy gradient material, the relative density of compacts from pure Mo layer of 94.2% pure Cu layer transition to 98.4%. Preheat powder warming up to 350 ℃, powder Preheat help improve the quality of explosive consolidation.

Low melting point of copper micro-explosion explosive consolidation mechanisms to molten solder based, and molybdenum places cavities collapse mechanism based. The gradient material layers of Mo-Cu alloy exhibits excellent thermal conductivity, Mo-11Cu layer and the Mo-25Cu layer thermal conductivity rate reached 204. 76W / m · K and 249. 71W / m · K. After consolidation of the explosion, there was an obvious gradient material residual stress prone to delamination between the layers, therefore, for such as copper molybdenum alloy, W / Cu consolidation and other hard materials, in explosive consolidation are necessary after to stress annealing.

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